RU11753U1 - INSTALLATION OF PROCESSING POLYMERIC MATERIALS - Google Patents

Abstract

1. Installation for processing polymer waste, which includes series-connected nodes for sorting, washing, grinding, sintering and granulation, characterized in that it contains an additional washing unit for crushed waste in the form of a closed circulation line formed by a cylindrical apparatus with a conical bottom equipped with a turbine mixer, a pump, placed under the apparatus and the circulation pipe with a turbulent insert. 2. Installation according to claim 1, characterized in that it contains a wastewater treatment unit.

Description

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INSTALLATION OF PROCESSING OF POLYMERIC MATERIALS.

The utility model relates to equipment for the processing of industrial and household waste polymers into granulate, which can be used for the manufacture of products (pipes, films, building structures, etc.).

A known installation for the processing of waste from polyethylene 1. Obsolete plastic products are fed to a rotary grinder, crushed material in the form of pulp enters the auger washer, where my solution, water or water is supplied. From the screw washer, the washed crusher enters the squeezing device and from there to the vortex dryer, where it is dried with hot air, and then fed to granulation.

The closest to the proposed utility model is the installation for the disposal of mixed synthetics 2. In the first operation, the plastic waste in the washing installation is cleaned and removed with strong contaminants. After this, the grinding of synthetic materials. Then the crushed material is fed to the agglomeration site. In conclusion, the agglomerate with the aid of a conveyor is fed to the grinding site. After grinding, the material is stored in the hopper. From the hopper, the material enters the granulation and casting site. A common disadvantage of the described installations is the ineffective washing from pollution, which significantly affects the quality of the granulate, its physical and mechanical characteristics, and, as a result,

operational properties of products. The objective of the claimed utility model is:

-improvement of physical and mechanical properties of the obtained granulate

- wastewater treatment after washing and returning them to the cycle

This problem is solved by the introduction of an additional washing unit for crushed waste, made in the form of a closed circulation line. The circulation line is formed by a cylindrical apparatus with a conical bottom equipped with a turbine mixer, a pump located under the apparatus and a circulation pipe with a turbulent insert. For cleaning wash water

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node Consisting of tandemly connected apparatuses: a neutralizer reactor, a nutsche filter, a settling tank and a collection of purified waters.

MKIV29V17 / 00

In FIG. 1 shows a schematic diagram of the installation, which consists of a sorting conveyor 1, a washing apparatus 2, a grinder 3, a cylindrical apparatus with a conical bottom equipped with a turbine mixer 4, a pump 5, a circulation pipe with a turbulent insert 6, a centrifuge 7, an agglomerator 8, a granulator 9, a reactor - neutralizer 10, nutsche filter 11, sump with a conical bottom 12, a collection of purified water 13.

The proposed installation works as follows. The incoming polymer waste is conveyed by a conveyor to a sorting conveyor, where the polymers are sorted and the iron scrap is automatically separated. Sorted waste is fed to the washer. After removing surface contaminants, the waste goes to the chopper.

After grinding, the polymer crumb enters the apparatus with a conical bottom, and water (or a washing solution) is also supplied there. Using a turbine stirrer, the mixture is mixed, forming a suspension. For more intensive mixing using a pump creates a circulation of the resulting suspension in a closed line. The presence of a conical bottom eliminates the stagnant zones in the lower part of the apparatus, and the turbulizing insert creates a flow turbulization. After 15-20 minutes circulation suspension is fed to a centrifuge. After the centrifuge, the washing solution is returned to the primary wash, and the washed chips in the sinter to plasticize the polymer. Then the agglomerate enters the granulator. The resulting granules are packaged in bags and sent to a warehouse or product manufacturing. After washing, the wash water is sent to the wastewater treatment unit. Wastewater is collected in the reactor neutralizer, where it is neutralized to a neutral medium, then the neutralized water enters the suction filter to capture solid particles. After the filter, water is directed to a conical bottom sump where additional trapping of small particles takes place. The clarified upper water layer is discharged into a collector from where it returns to the primary wash with a pump.

The introduction of an additional washing unit eliminates the ingress of impurities (oils, fats, oil products, etc.) into the granulate, which impair the strength, elasticity, and other properties. Accordingly, the operational properties of the products are deteriorating. Table 1 shows the comparative physicomechanical properties of high density polyethylene obtained by the proposed technology from the multiplicity of washes. As can be seen from the table, the tensile strength, compression, static bending during the second washing increases. Hardness indicators have improved

Brinell and elasticity. According to their physical and mechanical characteristics, the granulate obtained on the proposed installation is not inferior to the granulate obtained from the primary polymer and is a complete raw material for the manufacture of consumer goods.

Dependence of the physicomechanical properties of high density polyethylene on their waste from the washing ratio.

Table 1.

1. Recycling of polymeric materials. Ed. E.G. Lyubeshkina, Moscow. Chemistry. 1985 p. 38.

2. The international competition-presentation on the issues of processing, utilization and neutralization of solid household - industrial wastes. Collection of offers. Proposition N4. Recycling Complex for Synthetic Materials / Plastics, p. 34. Tyumen, December-January 1996 - 1997

Claims (2)

1. Installation for processing polymer waste, which includes series-connected nodes for sorting, washing, grinding, sintering and granulation, characterized in that it contains an additional washing unit for crushed waste in the form of a closed circulation line formed by a cylindrical apparatus with a conical bottom equipped with a turbine mixer, a pump, placed under the apparatus and the circulation pipe with a turbulent insert. 2. Installation according to claim 1, characterized in that it contains a wastewater treatment unit.